27788020 has 24 divisors (see below), whose sum is σ = 62844264. Its totient is φ = 10260096.

The previous prime is 27788011. The next prime is 27788021. The reversal of 27788020 is 2088772.

It can be written as a sum of positive squares in 4 ways, for example, as 1532644 + 26255376 = 1238^2 + 5124^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27788021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53179 + ... + 53698.

It is an arithmetic number, because the mean of its divisors is an integer number (2618511).

Almost surely, 2^27788020 is an apocalyptic number.

27788020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27788020 is an abundant number, since it is smaller than the sum of its proper divisors (35056244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27788020 is a wasteful number, since it uses less digits than its factorization.

27788020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106899 (or 106897 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 27788020 is about 5271.4343399117. The cubic root of 27788020 is about 302.8906502705.

The spelling of 27788020 in words is "twenty-seven million, seven hundred eighty-eight thousand, twenty".